Let Me Take That Off Your Hands: Arrive in Rhodes. Future emperor Tiberius is there, fleeing his destiny and trying to live a normal life. Tell him that you're a time traveler from the future, and prove it with detailed prophecies of the next few years, including the fact that Caesar's heirs are about to die, leaving him sole heir to the throne. Warn him that when he eventually becomes emperor, he'll be miserable and unpopular, in part because it was clear that he never wanted the job. Persuade him that you're much better qualified, due to your advanced knowledge and ethics. Suggest that, when he's eventually begged to return to Rome, he do so on the condition that he be allowed to name you his heir. Spend the next decade ensconced in Rhodes, avoiding the butterfly effect, reinventing future technology, and translating The Lord of the Rings into Latin. When Tiberius is asked to become emperor, he invites you to join him as his chief advisor. For a few years, you prove your mettle and win popular support with your technology and literature. Tiberius then retires to Rhodes, leaving you in charge as regent. Nobody wants to assassinate you since that would just force Tiberius to come back. When Tiberius dies, you become the emperor in title as you have long been in fact.
Tell him that you're a time traveler from the future, and prove it with detailed prophecies of the next few years, including the fact that Caesar's heirs are about to die, leaving him sole heir to the throne.
While this plan would work in the scenario as specified by Yvain, we should probably disallow these kinds of solutions. We are trying to simulate a situation where a transhuman AI emerges in our own world; and, unlike Yvain's time traveler, such an AI would not have any foreknowledge of the future... Unless, of course, it becomes an oracle of some sort.
A recent discussion post has compared the difficulty of an AI destroying modern human civilization to that of a modern human taking over the Roman Empire, with the implication that it is impossible.
The analogy has a few problems: first, modern humans don't have much greater raw intelligence than the Romans, only a bit more knowledge and tools; an AI would have a genuine intelligence advantage. Second, a high-tech civilization like ours offers many more ways for a genius to cause chaos than existed in classical Rome: it's more plausible that you can throw a few existing technologies together to create a superweapon than that Ptolemy could have done likewise, and there's no ancient Roman equivalent to hacking a nuclear launch system.
But taking over ancient Rome might serve as an interesting upper bound on the difficulty of an AI taking over modern civilization. And it's a theme of Harry Potter and the Methods of Rationality that rationalists should be able to come up with creative solutions to seemingly hard problems. So if Professor Quirrell offered it as an extra credit assignment, how would you take over Rome?
Here are the rules:
- You are thrown back in time to the year 1 AD. You can choose to arrive anywhere in the world, but your method of arrival cannot itself give an advantage (you can't appear in a flash of light in the middle of a religious ritual or anything).
- You do not start with Roman citizenship or any other legal record of your existence.
- You keep your original physical characteristics, including sex, height, and fitness. You will appear in period-appropriate dress of your choosing, and can't carry any artifacts with you. You may start with enough money to live a patrician lifestyle for a year.
- You are intellectually near-perfect. You know all human knowledge as of 2012. You speak fluent Latin (and all other languages of the day) and can orate as eloquently as Cicero or Demosthenes. You are a tactical genius of the order of Caesar and Napoleon. And you have infinite willpower and goal-directedness: aside from human necessities like sleep or food, you need never rest.
- You win if you either become Roman Emperor (and are acknowledged as such by most Romans), or if a state you control conquers the city of Rome. You lose if you die, of old age or otherwise, before completing either goal.